Abstract: A bumper has a ram (1) cooperating by a pressure fluid chamber (5) with a collision energy dissipating unit (11), in which kinetic energy of progressive motion is converted into kinetic energy of rotary motion. The pressure fluid chamber (5) is made as an angle fluid splitter (4) comprising an input cylinder (3) co-operating with a piston (2) of the ram (1) and at least two output cylinders (6, 7) angularly deviated from an axis (20) of the input cylinder (3), said output cylinders co-operating with pistons (9), the piston rods (10) of which are linked with the energy dissipating units (11) driving spinning masses (15).

Abstract: The invention is related to a kinetic energy absorber, particularly useful for large mobile objects, applicable as a bumper in cars, elevators, rail-cars, quays and other objects susceptible to the effects of sudden collisions. It is characterized by the use of a rotor (4) connected to a bumper (6) through a multiplying gear (2).